if (a+b+4){ab+4(a+b)}-4ab=0, and a≠-4, b≠-4, then ( $$\frac{1} {(a+b+4)^{117}}-2^{-234}$$) is equal to

A

$$\frac{1} {4^{117}}$$

B

$$\frac{1} {2^{117}}$$

C

$$-\frac{1} {2^{234}}$$

D

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